The opening sequence of Believe , director Jon M. Chu's latest cinematic chapter in the life of pop phenom Justin Bieber, in theaters Christmas Day, finds the contemplative musical prodigy composing at the keyboard. That image is as striking — tattoos lace Bieber's long arms, while a hint of a mustache graces his upper lip — as its message is unmistakable. The kid from the YouTube videos may be growing up, warts and all, in full public view, but in the end it's all about the music —